Error when resolving es6 module using paths in TypeScript code

🐛 Bug Report

The following TypeScript code

import * as employeeData from 'Source_Data/employee';

generates this error message

    Cannot find module 'Source_Data/employee' from 'src/framework/module/header.ts'

    Require stack:
      src/framework/module/header.ts
      src/framework/backend/jsonData.ts
      test/unittest/backend/jsonData.ts

      1 | import {uuid} from 'Source_ODS/uuid';
      2 | //import * as employeeData from 'Source_Framework/data/employee';
    > 3 | import * as employeeData from 'Source_Data/employee';
        | ^
      4 |
      5 |
      6 | /**

      at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:306:11)
      at Object.<anonymous> (src/framework/module/header.ts:3:1)

when using this paths settings:

{
  "extends": "./configs/tsconfig_base",
  "compilerOptions": {
    "paths": {
      "Source_Modules/*": ["./src/modules/*"],
      "Source_Framework/*": ["./src/framework/*"],
      "Source_Data/*": ["./src/framework/data/*"],
      "Source_ODS/*": ["./src/framework/ods/*"],
      "Source_Vendor/*": ["./vendor/*"],
      "CoreImg/*": ["./img/*"],
      "jquery-ui/*": ["jquery-ui/ui/*"],
      "jquery-ui-css/*": ["./vendor/jquery-ui/ui-lightness/*"],
      "JQueryUIImg/*": ["./vendor/jquery-ui/ui-lightness/images/*"]
    }
  },
  "compileOnSave": false,
  "include": [
    "src/**/*",
    "test/unittest/**/*"
  ],
  "exclude": [
    "node_modules"
  ]
}

but when changing it to this

import * as employeeData from 'Source_Framework/data/employee';

it works as expected.

To Reproduce

The problem can be reproduced at will but I’m currently not able to extract it from a large production environment into a simple example.

Expected behavior

The code reporting an error should work the same way the workaround works as the module does exist.

Link to repo (highly encouraged)

Unfortunately not yet possible but working on it

Debug log:

ts-jest.log

envinfo

System:
    OS: macOS 10.15.7
    Node version: 14.15.0

Npm packages:
    jest: 26.6.3
    ts-jest: 26.4.4
    typescript: 4.0.5
    babel(optional):

[ahnpnl]

If one is using TypeScript path mapping in the project and want to use jest, moduleNameMapper must be configured for jest to understand. It is like a bridge between TypeScript and Jest.

ts-jest provides 2 ways to help to make it easier to configure:

• via util: https://kulshekhar.github.io/ts-jest/user/config/ see path mapping section.

• AST transformer to alter output: https://kulshekhar.github.io/ts-jest/user/config/astTransformers see public transformers section

[doberkofler]

@ahnpnl Thank you!